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Historical Notes
This Specimen
Hi: I saw your page and photos of the ICM 816 electronic calculator. I
know a little about them, and actually have two which I bought about
1972. I believe both are working. One I used and the other I gave to
my parents.
The Woodland Hills company was actually a subsidiary of Electric Arrays
in Mountain View, CA. Electric Arrays made the 6 chip set and the chip
set was advertised quite heavily in Electronic News. That would be
about 1970 - 1972.
Initially the 816 was to sell for around $450, but when Electric Arrays
got into financial troubles they dumped inventory for cash and they were
sold at a San Jose outlet for around $135 each. That is where and when
I bought the two that I have.
I moved onto smaller pocket calculators the ICM 816 eventually lost its
desk space. But for quite a while I would use it to get the precise
integer result up to 16 digits which was better than most calculators
will do today. ? As I recall on division you actually got both a
quotient and a remainder?
I hope this might give you a clue as to where to look for specs on the
IC's in the ICM 816. I think it deserves a proper place in the history
of Calculators because as far as I know it was the first to ever sell
for under $200. If this is true it would be the first "personal home
calculator".
Just so you can figure out what a ICM 816 calculator is here is the
URL I was responding to.
http://www.geocities.com/SiliconValley/Lab/7510/icm816.html
Includes descriptions, pictures inside and out,
describes the technlogy. Also articles from
the HP Journal on the caculators, including
the one that I co-wrote:
The site also publishes a 5 CD set of manual scans
for the various calculators, including some repair
manuals.
Anyway, Check It Out!
Back when
the dinosaurs were still running around and I was a Pfc in the U.S. Army I
was assigned for duty in the Adjutant General's Office in a
Personnel Research unit for the U.S. Army. It seems that a good portion of
my time on military duty was with one of those Monroe calculators in front of
me and me working the keys.
It was a neat machine. It was the only thing
available at that time that enabled one to run correlation coefficients
easily [actually with a lot of work but far easier than any other way] as one
could get the Sum of X and the Sum of Y and of X Squared and of Y Squared and
2 times the Sum of XY in one run through the data.
It was then an easy
adjustment to work out the correlation coefficient. A significant portion of
my military duty was so spent.
Remember at this time the only computers available were those early IBM 700
series machines ... so speak nicely of the old Monroe machine. Later on when
I did my Master's Thesis research I used one again.
If you have comments or suggestions, Send e-mail
to Ed Thelen
Go to Antique Computer home page
Updated April 12, 2003
Return to "Visible Storage"
Since then I have added material occasionally.
Items are certainly not complete, and may be inaccurate.
Your information, comments, corrections, etc. are eagerly requested.
Send e-mail to Ed Thelen.
Please include the URL under discussion. Thank you ***
Manufacturer -
Identification,ID -
Date of first manufacture -
Number produced -
Estimated price or cost -
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Subject: ICM 816
From: LaFarr Stuart
To: rickb@pail.enginet.com
Memories of Monroe
I found an incredible website on
HP calculators, starting with the desktop 9100.
from W. R Collins
after hearing that I was the successful bidder on
an old 10 columns of keys Monroe calculator
Let's not knock the old Monroe calculator! It hurts my feelings!
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